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Download BU1-AC - AC-voltage relay
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BU1-AC - AC-voltage relay Application Over- and undervoltage supervision of 1- and 3-phase systems. Function Unit BU1-AC is equipped with an independent over(U>) and undervoltage supervision (U<) with separate adjustable pickup values and common trip delay (t) and hysteresis (DIFF). The voltages are compared with the set reference values. For three-phase overvoltage supervision the highest voltage in each phase is evaluated, for undervoltage supervision the lowest in each phase. Pickup of supervision circuit U> or U< is indicated by flashing of the corresponding LED. At U< - tripping LED U< extinguishes, at U> - tripping. LED U> is steady lit. At voltages < 60 % Un no trip delay takes place. Technical data rated voltage Un: 110 V, 230 V, 400 V AC rated frequency range: 45 - 66 Hz power consumption in voltage circuit: 3.5 VA thermal load carrying capacity of the voltage circuit: constant 1.3 x Un dropout to pickup ratio: dependent on the set hysteresis dropout time: 300 ms minimum operating delay: 300 ms rated current: making current: System data regulations: temperature range at storage and operation: mechanical stress shock: vibration: degree of protection unit front: weight: mounting position: TD_BU1-AC_02.06_GB Unit BU1-AC is designed to be fastened onto a DINrail acc. to DIN EN 50022 same as all units of the BASIC LINE. The front panel of the unit is protected with a sealable transparent cover (IP40). Please remove the transparent cover at the appropriate openings with a screw driver to adjust the relay. LEDs LED U< is used to indicate trouble free operation with steady light. LEDs U> and U< indicate pickup of the relay by flashing. At undervoltage tripping LED U< extinguishes. LED U> indicates tripping at overvoltage (steady light). 110 ohmic 250 V AC/120 W DC inductive 500 V AC/75 W DC 5A 20 A 75 Output relay maximum breaking capacity: Fig. 1: Front plate VDE 0435, part 303 65 - 25°C to 70°C Fig. 2: Dimensional drawing BU1-AC class 1 acc. to DIN IEC 255-21-2 class 1 acc. to DIN IEC 255-21-1 IP 40 at closed front cover approx. 0.5 kg any 1 Auxiliary voltage supply Unit BU1-AC needs no separate auxiliary voltage supply. The supply voltage can be formed directly from the measuring quantity. unit dead or undervoltage A) Two-wire system trouble free operation overvoltage B) Three-wire system Fig. 4: Contact positions Connecting terminals 2 The connection up to a maximum of 2 x 2.5 s mm cross-section conductors is possible. For this procedure the transparent cover of the unit has to be removed. Setting ranges U<: 0.7 - 1.1 · Un U>: 0.9 - 1.3 · Un t: 0 - 10 s DIFF: 2 - 10 % fn: 45 - 66 Hz C) Four-wire system Order key quantity BU1-ACRated voltage 110 V Rated voltage 230 V Rated voltage 400 V The rated voltage of the unit is determined and defined by the voltage that was measured between terminals 1 and 4, 2 and 4, 3 and 4. Fig. 3: Connection diagrams 3-phase 3-phase 3-phase 3-phase 2 System 110 V 400 V 400/230 V with N 690/400 V with N 110 230 400 Relay type BU1-110 BU1-400 BU1-230 BU1-400 Connection diagram B B C or A (A for single-phase measuring) A (only single-phase measuring possible) TD_BU1-AC_02.06_GB TD_BU1-AC_02.06_GB 3 Woodward SEG GmbH & Co. KG Krefelder Weg 47 ⋅ D – 47906 Kempen (Germany) Postfach 10 07 55 (P.O.Box) ⋅ D – 47884 Kempen (Germany) Phone: +49 (0) 21 52 145 1 Internet Homepage http://www.woodward-seg.com Documentation http://doc.seg-pp.com Sales Phone: +49 (0) 21 52 145 635 ⋅ Telefax: +49 (0) 21 52 145 354 e-mail: [email protected] Service Phone: +49 (0) 21 52 145 614 ⋅ Telefax: +49 (0) 21 52 145 455 e-mail: [email protected]